Belt cradle for roving and spinning frames



June 21, 1938. 5. WEST BELT CRADLE FOR ROVINQ AND SPINNING FRAMES Filed March 26, 1937 llll Patented June 21, 1938 BELT CRADLE FOR ROVING AND SPINNING FRAMES George West, Whitinsville, Mass, assignor to Whitin Machine Works, Whitinsville, Mass, a corporation of Massachusetts Application March 26, 1937, Serial'No. 133,228

10 Claims.

This inventionrelates to roving and spinning frames in which endless belts and aprons are provided for controlling the yarn fibers and for advancing the fibers from one pair of driving 1 rolls to the next.

scribed.

My improved cradle comprises side plates 20 and 2|, a cross rod or stud 22, and a pair of the guide-bars l5 previously described. The stud 55: 22 and guide-bars I5 are permanently assembled with the side plate 20, these parts preferably having reduced end portions headed or spun to secure the stud and bars in theplate.

The outer end of the stud 22 also has areduced portion 24 which forms a pivotal bearing the position shown in Fig. 5 only when manually displaced and held from return movement.

The upper belt is then inthe dotted line position shown in Fig. 1, in which position the upper intermediate roll it is inserted in the belt. The

It is the general object of my invention to profor the side plate 2|, which plate also has open- 5 vide an improved cradle for supporting a pair ings 26 to receive the reduced and substantially of endless belts in association with the rolls of rectangular outer end portions or projections 2'! aroving or spinning frame, and for guiding the of the guide bars l5. V o-iibelts in adesired path. A stud or screw 30 having an enlarged head A further object is to provide a cradle which 3! is slidable in an axial opening in the stud 22 may be assembled in operative position without and extends into a recess 33 in said stud. A coil distortion or injury to the belts. spring M is mounted on the stud within the recess With these general objects in View, an important 33 and is compressed between an end wall of the :5. feature of my invention relates to the provision recess and a nut 35, threaded on the stud 3i] and of acradle of simplified construction and having freely slidable in the recess. After the nut has no loose or removable parts. Another feature reeen djus y a Su table tOOl inse ted in the lates to the provision of an improved means for recess 33, a cap 36 may be forced into the d guiding the new by which edge w ar f the belts of the recess to close said recess, as shown in tis substantially eliminated. 1 Fig. 5. My invention further relates to arrangements The somewhat simpler stud construction shown and combinations of parts which will be herein Fig. 8 may be substituted if desired. In'this inafter described and more particularly pointed form, the stud 31 has a straight hole through out in the appended claims. which a headed bolt 38 extends. The bolt is se- A preferred formof the invention is shown in cured by a nut 39 outside of the side plate 20.

the drawing, in which- This nut must be loosened before the cradle parts i Fig. 1 is a sectional sideelevation of my imcan be separated. proved cradle, in'association with drawing rolls The side plates 20 and 2| have ofiset flanges" a d endlesshelts; All and M at their rear end portions, and also 301i s- Zis slde elevation o the d have their middle portionsoutwardly oifset as Fig. 3 is a front elevation, looking in the direc-- indicated at 42 and 43 all for a purpose to be tion of the arrow 3'in Fig. 2; describei i 4 is a l yiew, looking in the direction Having described the details of construction of of i ELYFOW 4 2 my improved cradle, the manner of application 5 5 ect1ona1 a taken along the and advantages thereof are as follows: :35 2; p When the cradle is to be applied in a roving i r- 6 1S slde elevat-lon showmg t Parts m or spinning frame, the parts are moved around 1 1 assembly; i to the position shown in Fig. 6, after which the p 7 1s g g Vlew .gulde 1 lower guide-bar 15 15. inserted in the lower belt gfi g i gg are detal vlewso modlficauon" M, which has previously been mounted on the Referring to the drawing, 1' have shown my imlower Intermediate 9 prove-d .cradle associated with a set of drawing T upper belt then over the uppel rolls comprising "a pair of back rolls l0, intermegulde bar and the 3 plate sw'ung arwnd 45.73am? r0115 H and f nt rolls Uppsr and to the position shown 11 1F1g.2, in which position 45 lower belts or aprons |3 and M provided, the pro ections 2i snap into theopenmgs 26. The which belts encircle the intermediate rolls II Parts are held in this assembledrelation by the and at their front or lower ends are positioned spring 34, acting through-the Stud 30 and 5 by guide bars l5, one of which is shown in Fig. '7. ed d 3 502 These bars form a part of the cradle to be 1 It will be understood that the plate 2| assumes belt and roll are then swung downward to the operating position shown in Fig. 1.

It is sometimes desirable to vary the distance between the guiding portions of the bars l5, particularly as the nip of the belts l3 and 14 changes as the belts wear and become more flexible. To permit such adjustment, I may mount one or both of the guide bars as shown at 45 in Fig, 9. The bar 45 has a pivot portion 46 and a threaded portion 41, both located near one edge of the bar and loosely fitting pivot holes in the side plates. A nut 48 retains the adjustment.

Instead of mounting both guide bars on the plate 20, I may mount one bar I5 on the plate 20 and the other bar l5 on the plate 2|, as shown in Fig, 10.

Reference to Fig. 1 will show that the belts are guided laterally by the end portions of the side plates 20 and 2|, which end portions 50 engage the belts as they pass around the guide bars l5 and while they are approaching but still clear of the rolls ll. Those portions of the belts which are gripped between the rolls are not engaged by the side plates, by reason of the outwardly displaced portions 42 and 43.

I thus guide the belts in desired paths by engagement with those portions of the belts which are approaching the rolls but not yet under pressure and which may be readily shifted laterally if necessary, while on the other hand no lateral or transverse pressure is applied to those portions of the belts which are under pressure and which are incapable of yielding transversely. Consequently the belts are easily and accurately guided and there is practically no wear on the edges of the belts, as is the case where the side plates engage those portions of the belts which are under pressure.

The flanges 40 and 4| are provided to limit side travel of the roving R by engagement therewith, as indicated in Fig. 1, so that the roving may not traverse so far in either direction as to run off of the edges of the belts.

The advantages of my improved cradle will be readily apparent. In the first place, there are no loose parts to be removed and replaced and consequently to be readily lost. In the second place, the straight and unobstructed guide-bars l5 are easily inserted within the belts by a simple straight movement, so that no stretching or distortion of the belts is occasioned by either assembly or separation of the parts. Furthermore, the extreme simplicity of the assembled structure assists greatly in maintaining the desired cleanliness of the machine.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

l. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud fixed thereto, a second side plate movably mounted on the outer end of said cross stud, a pair of guide-bars each secured in one of said side plates and having locating engagement with the other side plate, and means to hold said parts in operative relation.

2. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud fixed thereto, a second side plate movably mounted on the outer end of said cross stud, a pair of guide-bars secured in said first side plate and having locating engagement with said second plate, and means to hold said parts in operative relation.

, 3. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud fixed thereto, a second side plate pivoted on the outer end of said cross stud and having openings therein, a pair of guide-bars secured in said first side plate and having projecting end portions insertable in said openings in said second plate, and yielding means to hold said parts nor- 'mally in operative relation and to prevent dis assembly of said parts.

4. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud fixed thereto, a second side plate movably mounted on the outer end of said cross stud, said side plates having openings therein, a pair of guide bars each secured in one of said plates and having a projecting end portion insertable in an opening in the other plate, and means to hold said parts in operative relation, one of said guide bars being angularly adjustable in said side plates and means being provided to preserve the angular adjustment of said bar.

5. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud fixed thereto, a second side plate pivoted on the outer end of said cross stud and having openings therein, a pair of guide-bars secured in said first side plate and having projecting end portions insertable in said openings in said second plate, and yielding means to hold said parts in operative relation, one of said guide bars being angularly adjustable in said side plates and means being provided to preserve the angular adjustment of said bar.

6. A cradle for endless belts in a roving or spinning frame comprising a side plate, a cross stud. fixed thereto, a second side plate pivoted on the outer end of said cross stud, said plates having openings therein, a pair of guide-bars secured in one of said side plates and having projecting end portions each insertable in said openings in said side plates, and a spring-operated plunger mounted in said cross stud and effective to hold said parts normally in operative relation.

7. A cradle for endless belts on drawing rolls in a roving or spinning frame comprising a cross rod, a pair ofguide-b-ars, a pair of side plates spaced apart by said rod and bars, and means to hold said parts normally in operative relation, said side plates having portions engaging and transversely guiding the belts at points only where said belts are free from pressure and having all portions adjacent the belts as they approach or engage the drawing rolls offset outwardly to clear the edges of said belts.

8. A cradle for endless belts in a roving or spinning frame comprising a cross rod, a pair of guide-bars, a pair of side plates spaced apart by said rod and bars, and yielding means to hold said parts in assembled relation, said side plates having portions engaging and transversely guiding the belts at positions where said belts are approaching the rolls and are free from pressure, and having other portions clearing the edges of said belts at positions where the belts are leaving the rolls and are under pressure.

9. A cradle for endless belts in a roving or spinning frame comprising a fixed one-piece side plate, a movable one-piece side plate, a cross rod permanently and pivotally connecting said side plates, and two guide bars each fixed in one of said plates, all of said parts being permanently assembled but one of said side plates as a unit being pivotally mounted relative to the other side plate on said cross rod, means to determine the normal operative position of said pivoted side plate, and means to hold said pivoted plate in operative position but permitting manual displacement thereof.

10. A cradle for endless belts in a roving or spinning frame comprising two side plates, a

pair of belt guide-bars spaced apart and. located in and between said side plates, one of said guide bars being angularly movable to selectively vary the spacing between said guide-bars, and means to maintain a selected spacing of said bars.

GEORGE WEST.

CERTIFI GATE OF CORRECTION.

June 21, 1958.

Patent No. 2,121,1 7.

GEORGE WEST.

It is hereby certified that error appears in the above numbered'patent The present sheet of drawing should be canceled and the sheet shown below should be substituted therefor as a part of the Letters Patent requiring correction es follows:

June 21,1938.

G. WEST BEIJ'I CRADLE FOR ROVING AND SPINNING FRAMES Filed March 2s,

' I. \'\'E\'TUR. 620/ e 7962f AI'I'UhX EY.

and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of August, A.'D. 1958.

Leslie Frazer Acting Commissioner of Patents.

(Seal) 

